As part of the law, businesses selling products to people in California must provide “clear and reasonable warnings” before knowingly exposing people to any chemical on the list, unless the expected level of exposure would pose no significant cancer risk. This warning is often in the form of a label on the product or its packaging. Labels warning that a product contains compounds that may cause cancer, birth defects, or reproductive harm are now required on many household items sold in California. But people all over the country see them because many companies put the labels on all items that contain these compounds, even if they’re to be sold in other states. The warning labels can be found on many kinds of products, such as electrical wires, jewelry, padlocks, dishes, flashlights, and pesticides, to name just a few. You can check Proposition 65 for more information.